JP3973736B2 - Stirring lid of color box of paint stirrer - Google Patents

Abstract

A device for mixing paint in its can (11) comprises a lid which fits on to the can and carries a rotating assembly comprising a shaft (13) which extends down into the can and carries a paddle (15), the lower end of the assembly being urged axially towards the floor (17) of the can by the rotation of the paddle but prevented from direct contact therewith by a freely rotatable member (31) with at least three projections (39) contacting the floor.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an agitation lid of a color tone box of a paint agitation device, and more particularly to an agitation lid provided with a device for preventing contact wear of the agitator against the bottom surface of the box during the agitation operation.
[0002]
[Prior art]
As is well known, the hydrodynamic action of brushing the stirrer in the paint pushes the stirrer shaft downward with a relatively large force, so that the stirrer shaft is mounted in a translational manner relative to the upper drive lid. If done, the end of the stirrer shaft frictionally contacts the bottom of the box, causing its rapid wear. The box bottom is actually relatively thin, about 0.2 mm thick, and the erosion particles on the box bottom contaminate the paint being processed.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide an agitation lid for a color tone box of a paint agitation apparatus that solves such problems.
[0004]
[Means for Solving the Problems]
The present invention includes an agitation shaft mounted so as to freely translate with respect to the agitation lid, the axis comprising an axial rod that is rotationally driven and a lower agitation blade, and the agitation shaft during the agitation process In the stirring lid of the color tone box on the paint stirrer, which is adapted to be brought into contact with the bottom of the box by the thrust of the blades, the stirring shaft has an end abutting the bottom of the box at its lower end, and this end is It is characterized in that it is rotatably mounted on the agitation shaft and that this end is provided with at least three downward projecting parts in contact with the bottom of the box in the same plane perpendicular to the shaft.
[0005]
Of course, the three lower ends of the three projecting parts at the end are all arranged in the same plane substantially parallel to the bottom surface of the box, and the periphery of the triangle thus defined surrounds the axis. . These protruding parts make point contact with the bottom of the box.
[0006]
Even if there is some eccentricity of the end within these three contact points, the end is preferably mounted so as to freely rotate coaxially with the stirring shaft.
[0007]
As a result of such a structure, the stirring shaft is brought into contact with the bottom surface of the box by its end during stirring, and the end remains fixed on the bottom surface of the box because of the fixing of the contact point of the protruding part. The shaft rotates on the end. Therefore, the bottom of the box is not eroded by the stirring shaft.
[0008]
The end has a specific height relative to the blade, preferably to bring the blade to a specific optimum operating height relative to the bottom of the box.
[0009]
In addition, the three point abutment end provides a stable lower foundation for the axis of rotation.
[0010]
The end is a circular disc having a diameter slightly larger than or equal to the diameter of the rod of the stirring shaft (4-15 mm) and mounted perpendicular to the rotating shaft. The protruding part is a cylindrical finger with a rounded end. These fingers are arranged on the circumference at intervals of 120 °.
[0011]
Coaxial rotatable mounting on the agitation shaft at the end is ensured by a circular ratchet device that engages in a hole in the end column of the agitation shaft.
[0012]
The ratchet mechanism is composed of three hooks fixed in the upper central portion of the end portion, and the upper end protrusion of the hook cooperates with the complementary cylindrical skirt of the shaft pillar body. This end of the rotatable mounting portion is preferably made of a low friction coefficient synthetic material such as "Teflon".
[0013]
The agitation shaft comprises vanes having a helical structure (of a helical bus). By virtue of its three engagement points according to the invention, the end can efficiently bring this spiral blade from the bottom of the box with optimum performance to the correct reference height to a level that does not require vibration mounting of the blade.
[0014]
The spiral blade is mounted in a translational manner on the lower part of the rod of the stirring shaft, and its end is rotatably mounted coaxially on the lower part of the blade, and this end is a leading edge below the blade. Thus, the protrusion protrudes by a specific height corresponding to the contact height of the end portion with the bottom surface of the box in the optimum operating state.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail below with reference to embodiments shown in the drawings, but the present invention is not limited thereto.
[0016]
Referring to FIG. 1, the agitation lid 1 is of the prior art type (other than the agitator) and is arranged on a discharge port 3, an operating handle 5 arranged on the diametrically opposite side of this discharge port, and a vertical axis. And a stirring shaft 7. The stirring shaft 7 is driven by an upper pinion 9, and the upper pinion 9 itself meshes with a continuous chain (not shown) of the stirring device to which the stirring lid 1 is attached. The stirring lid 1 receives a lower color box 11.
[0017]
The stirring shaft 7 includes an axial rod 13 and a lower stirring blade 15. The lower stirring blade 15 is attached to the lower portion of the axial rod 13 so as to be movable in a translational manner so as to descend from the bottom surface by a short distance toward the bottom portion (horizontal bottom surface) of the color tone box 11 by a hydrodynamic stirring action.
[0018]
The axial shaft 13 has a constant length allowed by the translational installation of the blades, this axial length can be used in various boxes of a given volume range and the height of the box is It varies slightly from structure to structure.
[0019]
The lower stirring blade 15 is a blade having a spiral bus 19 and can be used without having to vibrate the stirring shaft 7 because of its brushing efficiency. Such vibration of the stirring shaft 7 required suspension mounting of the blades corresponding to the height of each box in the prior art.
[0020]
The lower stirring blade 15 is attached to the stirring shaft 7 by a central column 21 so as to be slidable by a predetermined distance in the vertical direction. This column 21 has two longitudinal shoulders 23 diametrically opposed. Each shoulder 23 has an inner groove 25, and each groove 25 receives a complementary rib 27 of the stirring shaft 7. The upper translation of the blades is limited by an upper stopper 29 at the upper end of each groove 25, and similarly the lower translation is limited by the lower stopper.
[0021]
The blade 15 further includes a lower abutting end portion 31 rotatably attached to the lower end of the axial column 21, and the end portion 31 projects below the lower horizontal straight edge 33 of the blade. The distance h between the lower horizontal surface of the end 31 and the lower edge 33 of the blade is determined according to the blade and the paint to be treated so as to obtain (minimum) optimum stirring efficiency.
[0022]
The end portions 31 (FIGS. 2 and 3) have a disk-like or circular plate-like main body 35 having the same diameter as the pillars of the blades 21 and an angle interval of 120 ° perpendicular to the center of the disk 35. Three upper engaging hooks 37 (clip legs) arranged on the same circumference and three lower engagement parts arranged vertically on the same circumference at the same interval of 120 ° on the lower surface of the disk 35. Finger 39. This assembly is axially symmetric and is molded from a synthetic material with a low coefficient of friction (based on “Teflon”).
[0023]
The finger 39 has a rounded end and abuts on the bottom surface 17 of the box 11 (in a plane perpendicular to the axis) during the stirring process. These fingers 39 are arranged along substantially the outer periphery of the disk 35 and are rigidly held by the radial ribs 41 with respect to the disk 35, and the lateral arrangement of these fingers increases the bonding couple to the bottom of the box. , Prevent rotational slip on the bottom of the box.
[0024]
The upper hook member 37 forms a rotationally connected portion of the end portion 31 with respect to the blade. These hooks 37 have upper engaging projections 43 directed radially outward and ratchet engage into a complementary cylindrical skirt portion 45 on the lower inner surface of the vane body. The skirt portion 45 extends vertically, sandwiches the vertical leg portion of the hook 37 with a small gap in the small diameter portion 47 below it, and receives the hook protrusion 43 in the upper portion of the maximum diameter of the skirt. . Such an engagement mounting structure of the end portion 31 with respect to the blade column body 21 provides a clearance for rotational lateral movement on the one hand and a play for lateral motion on the seating surface of the column body 21 on the bottom surface 17 on the other hand. Give a gap.
[0025]
The relative rotational sliding movement between the end 31 and the blade 15 is carried out between the mutually opposite horizontal planes, ie the lower horizontal plane 49 of the blade column 21 and the corresponding upper side 49 ′ of the disk 35. The This sliding couple is very low, much lower than the sliding couple at the point of contact of the finger 39 on the bottom surface 17 of the box.
[0026]
Furthermore, because the end 31 is mounted with a ratchet, when the end 31 is worn or replaced with an end 31 of a different height according to the paint to be treated, this end is simply pulled out with the blade of the driver. Can be withdrawn.
[0027]
Furthermore, as mentioned above, the end 31 can be attached directly to the lower end of the shaft of the agitator instead of on the blade as a modification, in which case the shaft is nested with the blade fixed on it. Slip, or the blade can translate on the shaft.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a side view showing a part of a mounting portion of an abutting end of a stirring lid of a stirring lid with a box according to the present invention.
FIG. 2 is an enlarged sectional view in an axial direction of an abutting end portion of a stirring lid.
FIG. 3 is a bottom view of the abutting end of the stirring lid.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stirring lid 3 Discharge port 5 Handle 7 Stirring shaft 9 Pinion 11 Color tone box 13 Shaft rod 15 Stirring blade 17 Box bottom surface 19 Blade busbar 21 Column body 23 Shoulder 25 Groove 27 Rib 29 Stopper 31 Abutting end 33 Lower edge 35 of the blade Disc 37 ratchet mechanism (hook)
39 Finger 41 Rib 43 Engagement projection 45 Skirt 47 Small diameter hole portion 49 Upper side surface 49 'End side lower side surface of column

Claims (11)

A stirring shaft (7) mounted to translate freely with respect to the stirring lid, the stirring shaft comprising an axial rod (13) driven in rotation and a lower stirring blade (15); In the stirring lid of the color box of the paint stirring device, the stirring shaft (7) is brought into contact with the bottom surface (17) of the box by the thrust of the blades during the stirring process. An end (31) that abuts the bottom of the box is provided, and this end (31) is rotatably attached to the stirring shaft (7), and this end is on the bottom surface of the box on the same plane perpendicular to the shaft (7). An agitation lid comprising at least three downwardly projecting parts (39) in contact with (17). The stirring lid according to claim 1, characterized in that the end (31) is mounted coaxially and rotatably with respect to the stirring shaft (7). The stirring lid according to claim 1 or 2, characterized in that the protruding part (39) makes point contact with the bottom face (17) of the box. The end (31) has a specific height relative to the vane so as to bring the vane (15) to a specific optimum operating height relative to the box bottom (17). The stirring lid according to any one of 1 to 3. The end (31) has a diameter slightly larger than or equal to the diameter (4-15 mm) of the rod (13) of the stirring shaft (7), and is a circular disc mounted perpendicular to the rotating shaft (7) ( 35), wherein the projecting part (39) is a cylindrical finger with rounded ends, the fingers being arranged circumferentially at intervals of 120 ° to each other. The stirring lid in any one of thru | or 4. The rotatable mounting of the end (31) on the stirring shaft (7) is ensured by the ratchet mechanism (37) engaged in the column holes (45, 47) at the end of the stirring shaft (7). The stirring lid according to any one of claims 1 to 5, wherein: The ratchet mechanism (37) has a circular structure, and is composed of three hooks fixed in the upper center portion of the end portion (31). The upper end protrusion (43) of the hook is a shaft column (21). A stirring lid according to any one of the preceding claims, which cooperates with a complementary cylindrical skirt (45). Said stirring shaft (7) comprises a blade (15) having a helical structure (of a helical bus), this helical blade (15) being mounted in a translational manner on the lower part of the rod (13) of the stirring shaft (7). The end (31) is coaxially and rotatably attached to the lower part of the vane (15), and the end (31) extends from the lower front edge of the vane to the end (31) in the optimum operating state. The stirring lid according to any one of claims 1 to 7, wherein the stirring lid protrudes by a specific height h corresponding to the contact height with respect to the box bottom surface (17). 9. Stirring lid according to claim 8, characterized in that the rod (13) of the stirrer shaft has a certain fixed length that can be used for various boxes (11) within a given volume range. The blade (15) is attached to the stirring shaft (7) by the central column (21) so as to slide along a specific stroke in the vertical direction, and the column (21) has two longitudinal directions opposed to each other in the diameter direction. Each shoulder (23) is provided with an inner groove (25), each groove (25) receives the complementary rib of the shaft rod (13), and the upward translation of the blade is the upper end of each groove 10. Stirring lid according to claim 8 or 9, characterized in that it is limited by an upper stopper (29) of the upper and lower translational movements are likewise limited by the lower stopper. 11. The stirring lid according to claim 1, wherein the end portion (31) has an axially symmetric shape and is formed by molding a synthetic material having a low coefficient of friction.

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